Simplify several ArcDataset methods, etc
Add tests for ArcDataset
Add ArcData#quantize(), fix a bug
Fix jshint warnings in src/
Fix jshint warnings in src/gui/
Add .npmignore to exclude test files
Keep node modules out of the repo
Add mapshaper-gui script
Fix with null shape and topojson export
Add bits about npm install and mapshaper-gui to the README
Accept directory names after -o flag
Fix: bug in protectWorldEdges()
Update mapshaper.js, etc